Unprotected sex around ovulation time is quite risky for being pregnant. Though morning after pill is quite effective if it is taken within 72 hrs following unprotected sex. It gives protection more than 95% within first 24hrs, around 85% in 24-48 hrs and 58% within 48-72 hrs.
Here, you need to wait for next coming period and if it is missed, you do a home pregnancy
test and one blood test
after 7 days to confirm the same.
Practice safe sex
in future. Good luck.